Like the 'Kate effect', everyone's favourite royal-to-be Meghan Markle seems to have a knack for causing things sell out.

She's already asserted herself as a fashion tour de force, with pieces she wears consistently selling out minutes after she's snapped donning them, and a travel trendsetter, capturing the world's attention with her and her famous fiancé's royal gallivants. And soon we'll find out whether her influential taste extends to London's West End.

Prince Harry and Meghan Markle made headlines this week after attending a performance of Lin-Manuel Miranda's trailblazing musical Hamilton for date night.

The show was already one of the most sought-after tickets in town – when it debuted on Broadway it was touted one of the hottest musicals of the decade.

Following Meghan and Harry's attendance of Hamilton at the Victoria Palace Theatre, we predict tickets will be a helluva lot harder to get hold of – so if you're planning a trip to London later this year, run don't walk to secure a spot.

The couple's date night was laid bare when one of the cast members confirmed the royal's attendance on Twitter.

Leslie Garcia Bowman, a New Zealander who plays a general in the production, tweeted, "Was an honour to have Prince Harry and Meghan Markle in to watch @HamiltonWestEnd last night!"

It's fair to say the musical has got the bride-to-be's seal of approval, seeing as though it's not even the first time she's attended the production – having seen it in New York on another "date night" with actress and friend, Priyanka Chopra. The post has since been deleted from her Instagram page.

But in terms of getting your mitts on a golden ticket, here's what you should know.

Firstly, all ticket resales are strictly forbidden, according to the Ticketmaster.co.uk website, so you can forget about buying them second hand.

As it stands, the earliest you can snap up non-premium tickets is August 2018, however if you're travelling to London earlier – say, in July – there's a couple of other sneaky things you can try to secure a spot.

The most cost effective way being the daily $18 (10 pound) lottery that takes place between 4pm and 2pm the following day. To enter, simply download the Hamilton app or visit the website.

You can also visit the Ticketmaster Hamilton website and check for daily returns offered for sale. Both methods come down to luck, but if it's good enough for the royals, then it's definitely worth the extra effort.